Quote:
Originally Posted by ausastronomer
4) You have over tightened the primary mirror clips which will prevent the primary mirror from shifting, which may reduce the need to collimate the primary, but will induce astigmatism which will degrade the image quality in any case.
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John
I didn't think over tightening the primary mirror clips would prevent the primary mirror from "shifting".
It would definitely cause pinched optics and degrade the image quality.
It was my understanding that the primary mirror is mounted with the clips onto the "mirror cell" and it is this cell that is adjusted via the three (3) rear accessed mounting screws and lock screws for collimating purposes, not the primary clips.
Regards Rick
